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Asteroid 7 Iris

Asteroid 7 Iris is currently in the constellation of Capricornus. The current Right Ascension of Asteroid 7 Iris is 21h 32m 04s and the Declination is -10° 43’ 45” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid 7 Iris is 10.25 (JPL).

Summary of key facts about Asteroid 7 Iris [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

21h 32m 04s
-10° 43’ 45”
Capricornus
10.25
  • 7 Iris is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-West direction at an altitude of 19° above the horizon.
  • Given its current magnitude, 7 Iris is visible with the help of a binocular with a 60mm aperture, might require a small telescope.
  • See also 7 Iris rise and set times.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Asteroid 7 Iris available on TheSkyLive:

Available Resources

Asteroid 7 Iris Position and Finder Charts

Below we provide Asteroid 7 Iris finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Asteroid 7 Iris in Capricornus on January, 21 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid 7 Iris in Capricornus on January, 21 2021
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 7 Iris is right now. Click on the image to see a more detailed fullscreen tracker view.

7 Iris
RA: 21h 32m 04s
Dec: -10° 43’ 45”
Deep sky finder chart for Asteroid 7 Iris
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 7 Iris?, a page that provides all the information needed to find Asteroid 7 Iris in the sky and additional links to sky charts.

Asteroid 7 Iris Distance from Earth

The distance of Asteroid 7 Iris from Earth is currently 451,145,206 kilometers, equivalent to 3.015719 Astronomical Units. Light takes 25 minutes and 4.8584 seconds to travel from Asteroid 7 Iris and arrive to us.

451,145,206
3.015719
25 minutes and 4.8584 seconds

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Asteroid 7 Iris to Earth

Between January 2013 and December 2100, the closest approach of Asteroid 7 Iris to Earth happens on Wed Nov 4 2076 at a distance of 0.848369 Astronomical Units, or 126,914,157 kilometers:

Wed Nov 4 2076
126,914,157
0.848369

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Asteroid 7 Iris brightness

The current visual magnitude of Asteroid 7 Iris is 10.25.

10.25

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2100

Asteroid 7 Iris rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 100.8°
Max altitude: 27.8°
Azimuth: 259.3°

The rise and set times are defined as the time at which the upper limb of Asteroid 7 Iris touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 30 May 2020 00:00 UTC (JD: 2459000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23014504
Orbit inclination i 5.52159829°
Perihelion distance q 1.83793274 AU
274,950,825 km
Aphelion distance Q 2.93681794 AU
439,341,712 km
Semi-major axis a 2.38737534 AU
357,146,268 km
Orbital period period 3.6900 years
1,347.3471 days
Date of perihelion transit Tp 2021-Jul-26 07:46:00
2,459,421.8236 JD
Argument of perihelion peri 145.20154460034°
Longitude of the ascending node node 259.56394336942°
Mean anomaly M 247.42581146248°
Mean motion n 0.26719173°/day

Visualization of Asteroid 7 Iris Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 14 21h 16m 24s -11° 59’ 05” 10.32 Aquarius
2021 Jan 15 21h 18m 27s -11° 49’ 36” 10.31 Aquarius
2021 Jan 16 21h 20m 29s -11° 39’ 59” 10.31 Aquarius
2021 Jan 17 21h 22m 32s -11° 30’ 16” 10.30 Aquarius
2021 Jan 18 21h 24m 33s -11° 20’ 29” 10.29 Aquarius
2021 Jan 19 21h 26m 36s -11° 10’ 36” 10.28 Aquarius
2021 Jan 20 21h 28m 38s -11° 00’ 37” 10.27 Capricornus
2021 Jan 21 21h 30m 42s -10° 50’ 31” 10.26 Capricornus
2021 Jan 22 21h 32m 44s -10° 40’ 22” 10.25 Capricornus
2021 Jan 23 21h 34m 47s -10° 30’ 06” 10.24 Capricornus
2021 Jan 24 21h 36m 51s -10° 19’ 45” 10.23 Capricornus
2021 Jan 25 21h 38m 54s -10° 09’ 19” 10.22 Capricornus
2021 Jan 26 21h 40m 58s -09° 58’ 46” 10.21 Capricornus
2021 Jan 27 21h 43m 01s -09° 48’ 10” 10.20 Capricornus